I have the same issue after one week of using on Manual Foucus. Exchange to a new

one by SEARS. The New I take care not to turn too fast, not use to enlarge playback until now seems OK. Nx100 is not designed to Profession USE level nor MANUAL DIGITAL CAMERA, take care of use this sharp machine. Samsung had good service on repair, free shipping both return and send back one week working time.

It is a common problem with other camera brands too. I had a similar issue with my Pentax K20d. Eventually mine solved itself but others have recommended lubricating the wheel contacts with a special conductive grease. I don't know how you are supposed to get the grease in where it is needed though.

OK never mind, they said a "field technician" would contact me; I assumed that meant they were sending someone to my house but looks like I have to mail it to a repair center.

I have no idea what's I'm supposed to do though; do I have to pay for shipping on this? It says to "attach waybills" etc. but the printout they emailed me doesn't look like a UPS label. I guess I will call them tomorrow. Crappy thing is I called 1-800-SAMSUNG and they said they were for US support only, even though that's the contact number listed for Canadian support as well :T

This is a major problem with the NX100. It is obviously a very poorly designed and engineered part . I expect it could account for 50% of Samsung's warranty issues and I hope they will change the design for the NX200. On the other hand I consider the NX100 to be a cheap but quite useful little workhorse but ultimately a disposeable camera. If all this was happening on a £1000 DSLR then I think we would have cause for a product recall.

Samsung's support procedure could use a little work; they sent me 3 emails with no indication of what would be coming next. The second email contained a shipping label but no UPS tracking # or barcode and no indication that the UPS shipping label would be coming.

Phone support was pretty awful with off-shored support. One of the three people I talked to was a jerk. The repair facility though was very helpful and was pleasant to deal with.

Anyways, I'll send the camera in and hopefully this gets fixed and doesn't crop up again; sucks I waited past 30 days to try to fiddle with manual mode and used "ok" to zoom out in playback (since the top wheel was sluggish as hell to zoom in as well). Live and learn I guess.

I have 3 of these cameras in my family so far. I got all 3 brand new and they comes from a different parts of the world and various series (black comes from Poland, grey from Germany and White from UK; still want a brown one to last kid when she grows up a little).

I find this camera very good, better than any of even newest nx (nx200, nx210, nx20, nx1000 etc.) because it has not such rough and deep noise reduction and does not higher ISO JPGs look so unnatural. It has better noise than micro 4/3 cameras and it is A WAY cheaper than other large sensor mirrorless cameras.

But it has 2 dents.

1. What it does is not controlling an external flash (SEF-42) AF light. I have fixed one of my cameras to do so on the warranty, the others I CANNOT because Samsung lets you use your warranty only in the country of purchase. SHAME ON YOU, SAMSUNG! It should be repaired any place regardless warranty because it is manufacturing issue - it looks ALL NX100 have this problem!

2. The other issue is what is described here - top plate control wheel goes crazy.

Let me describe what I've found. Probably it is because of moisture because these cameras get the problem even after a smallest contact vith wet weather when most cameras work fine after it.

The solution is very simple and I do so regardless warranty - do not have to wait to repair it and pay for shipping. All you need is some IPA (isopropyl alcohol). You just let a drop or two through the wheel (do not need to disassemble anything) and wait until it dries (what takes several minutes). After it you'll see it working properly, but not smooth. Now you need to let a drop of lubrification (oil for electric contacts would be best) through that control wheel and turn it for a while. It will work until another exposure to moisture. At least it works like it with all my 3 cameras of this type for 1,5 year.

I just went thru the same issue. phoned them, i had to fax them the invoice to prove purchase as these are all old cameras, they sent me a ups label. i took the camera to ups and sent it in. received it back 2 weeks later. working. i also received a weird phone call asking how it was 3 or 4 days before i got the camera back!

I also am sending in my NX100 for top control wheel repair. It took about 4 calls to get any info on where to send it ect......they finally sent me a UPS shipping label. The only problem i have now is nobody can tell me what I need to send in. Do I send only the camera body? Or body and battery, or body battery and lens?